Amazon.com: 20PACK 3/4 Inch Female PVC Pipe End Cap 3/4 Inch Female Threaded Plug Adapter, SCH 40 PVC Pipe threaded Cap Fitting 3/4" PVC Pipe Female Plug Socket for Plumbing Water Line,
NDS PVC S&D Cap, 3 in. 3P06 - The Home Depot
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Charlotte Pipe 3 in. DWV PVC Flush Cleanout Plug PVC 00110 0800 - The Home Depot
DURA 3/4 in. Schedule 40 PVC Plug C449-007 - The Home Depot